Type-writing machine.



Patented Mar. 4, |902. W. J. BARRON.-

TYPE WRITING MACHINE.

(Applieation led Nov. 27, 1899.)

5 SheetvsSheet l.

HIS TTDRNEY (No Model.)

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A Patented Mar. 4, |902.

w. .1,- BARRO". TYPE wn'lrma-mAcmm-z.

(Application :Bled NOV. ,27| 1899.)

5 Sheets-Sheet 2.

' (No Model.)

INVENTUR Nn-N555@ 5 z TTDRNCY 110.694,602, 'Y Patentedmar. 4,v |902.

` w. .1. BAnnoN. l

TYPE WRITING MACHINE.- (Apucazion mea Nov. 27, 1899.)

TM5 ATTDRNEY:

Patented-Mar. 4, |902.

w. J. BAnnon. TYPE WRITING MACHINE. (Application lod Nov. 27, 1899.)

5 Sheets-Shut 4.

(Ilo Model.)

INVENTDR TTDRNEY.

IHK Nonms Pncns co.. PlfioTo-Ll'n-lm wAsHlNsTN. n. ci

Patented Mar. 4,- |902.

w. J.AnoN. l yTYPE WRITING MACHINE.

(Application filed. Nov. 27, 1899.)

5 Sheets-Sheet 5.

(No Model.)

iNVNTDR TTDRNEY'.

Tn: Naines mens cci.. rnoroLrrno'wAsH|NaTom u. x:4

UNITED STATESV PATENT OFFICE.

WALTER J. BARRON, OF BROOKLYN, NEW YORK, ASSIGNOR TO ATHE DENS- MORE TYPEVVRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPO- RATION OF NEW YORK.

TYPE-WRITING MACHIN.

SPECIFICATION forming part of Letters Patent No. 694,602, dated March 4, 1902.

Application led November 27, 1899. Serial No. 738,892. (No model.)

To all whom it may oon/cern: the line YY in Fig. l looking in the direc* Be it known that I, WALTER J. BARRON, a tion of the arrow. Fig. 5 isa detail perspec; citizen of the United States, and a resident tive View of a disk shown in Fig. l. Fig. 6 is of the borough of Brooklyn, in the city of va detail perspective view of a clutch-'opening 5 New York, in the county of Kings and State lever shown also inFig. 1. Fig. 7 is a cen- 55 of New York, have invented certain new and tral longitudinal sectional view of a platen useful Improvements in Type-Writing Maand showing a modification of the invention.` chines, of which the following is a speciica- Fig.- 8 is a cross-sectional View upon the line tion. fu, u in Fig. 7 looking in the direction of the 1o The present invention relates to improvearrow. Fig. 9 is a viewsimilar to Fig. 8, but 6o ments in platens for type-writing machines, upon the line o o and lookingin the direction the immediate object ofthe invention being of the arrow. Figs. 1 0, 11, and 12 are detail to release the platen from its line-spacing perspective views of various parts shown in ratchet-wheel, so that it may be turned inde- Fig. 7. Fig. 13 is a central longitudinal sec- 15 pendently thereof in either direction and to tional view of the platen and showing a sec- 6 5 any position relatively thereto, and-to reconond modification of the invention. Fig. 14 neet the platen to the line-spacing wheel in is a sectional view upon the plane indicated such adjusted position for the purpose of in Fig. 13 by the line S S looking in the direcprint'ing upon or between lines, as in printed tion of the arrow. Figs. 15, 16, and 17 are de- 2o forms having blank spaces to be filledin with tailperspective views of partsshowninFig.13. 7o the type-writer, and at such reconnection to Fig. 18 is a centrallongitudinalsectional View lock the platen to the line-space wheel, so of ath-iard modification of theinvent-ion. Fig. that they will travel together without liabil- 19 is a sectional view upon the plane indi` ity of overthrow or creeping of the platen at cated in Fig. 18 by the line r r looking in 25 the usual line-spacing operation. the direction of the arrow. Fig. 2O is a View 75 Myiuvention furtherrelates to certain feasimilar to' Fig. 19, but with the parts in a tures of construction and combinations-of dedierent position. Figs. 21, 22, and 23 are vices, ashereinafter described, and more pardetail perspective views of parts shown intic'ularly pointed out in the appended claims. Fig. 18. Fig. 24 is a central longitudinal secy 3o The preferred form and sundry modiflcational view of a platen and showing afourth 8o tions of the invention are illustrated in the modification of the invention. Fig. 25 is a accompanying drawings, forming partof this sectional view upon the plane indicated in specification, in which- A Fig. 24 by the line W W looking in the direc- Figure 1 is a central longitudinal section1 tion of the arrow. Fig. 26 is asectional view 35 of a platen and shows the preferred form of upon the plane indicated in Fig. 24 by the 85 the invention. Fig. 2 is an end View of a line Z Z looking in the direction of the arplaten and carrier such as may be found in row, and Figs. 27 and 28 are detail perspecthe Densmore type-writing machine, this betive viewsof parts shown in Fig'. 24. ing the make of machine to which I have ap- The same part will be referred to by the 4o plied the invention in practice. At this View same numeral of reference in the drawings. 9o the Densmore line-spacing lever and pawl The preferred form of the invention illusare illustrated as just having effected a partrated at Figs. 1 to G, inclusive, will now be tial rotation vof the platen, the line-space described. wheel being positively arrested by means of 1 indicates a hollow wooden core; 2, a rub- 43 a horn which isintegral with said lever and ber sheath upon said core; 3, a metal disk 95 isl adapted kto press the pawl into va notch in having a hub 4 and secured to the left-hand the wheel, whereby overthrow of the wheel is end of the core 1 by wood-screws 5; 6, the prevented. Fig. 3 is a sectional view on the platen carrier or frame; 7, a short shaft jourline X X in Fig. 1 looking in the direction naled in a left-hand bar of the frame 6 and Y `5o of the arrow. Fig. 4 is a sectional View on fitting a bearing in the hub 4, to which it is 10o secured by a pin S, passing through perforations in the hub and shaft; 9, a loose collar or washer between the disk 3 and the frame G; 10, a hand-wheel secured to the shaft 7 by a pin 11, which passes through both the hub of the hand-wheel and the shaft; 12, a sleeve or collar arranged upon the shaft between the hub of the Wheel 10 and the frame 6.

At the right-hand end of the platen the sheath 2 projects slightly beyond the core 1. The end of the core is provided with a deep diametrical slot 13 and is also bored out to form a shoulder at 14. A metal disk 15 is secured to the right-hand end of the core 1 by screws 16, which pass through perforations 17 in the disk and engage the core 1. The disk is formed with a hub 18, which is shouldered or reduced at the end to take a bearing in a hole in the right-hand end bar of the platen-frame carrier G, as shown in Fig. 1. The disk 15 is also provided with a hub 19 upon the opposite side thereof from the hub 1S, and the end of hub 19 is provided with deep crosswisc or intersecting diametrical slots 20 2l, thus splitting it into four segments, as shown in Fig. 5. The hub 19 extends into the bore of the core 1. Two tapering or angular notches or recesses 22 23 are formed in the periphery of the disk 15, the bottoms of which are formed on inclined arcs which are struck from a center eccentric to the disk-axis, the degree of inclination of the arc being determined by the distance of ils generating-point from the diskaxis. Both notches are arranged upon one side of a diametrical line, and as the arcs are struck from a common center it results that one of them is inclined in one direction and the other in the other direction with respect to the peripheral line of the disk. So long as the notch is deep at one end and shallow at the other it is not essential that it should be arched or curved, inasmuch as it may be flat or straight. Preferably the shorter end walls of the notches are at diametrically opposite points upon the disk. However, the not-ch may, if desired, terminate at this point in a tangential line, as illustrated by a dotted line at 22, Fig. 3.

Outside of the disk 15 and loosely mounted upon the hub 13 thereof is a line space ratchet-wheel 24, which is provided with an integral inner fiange or ring 25, passing loosely within the over-hanging end of' the sheath 2 and loosely encircling the disk 15, as indicated in Fig.

26 is a detent-arm pivoted at 27 to the platen-carrier G and bent downwardly from above the platen to a point underneath the frame 6, as illustrated in Fig. 2, where it is provided with a laterally-extending flanged stud 2S.

29 is a fiat spring fulcrumed upon a lug 30 under the right-hand end bar of the platencarrier 6 and at one end pressing upon the upper side of the stud or roller 28. The other end of the spring is engaged by the head of an adjusting-screw 3l, which enters a thread ed hole in the said end bar.

32 is a detent-roller pivoted upon'a stud 33, secured to the arm 26 aforesaid and engaging the teeth of the ratchet-wheel 24 to properly position the ratchet-wheel.

34 and 35 are small rollers placed respectively in the races formed by the flange 25 and the angular recesses 22 and 23 aforesaid. These rollers may be either balls or short cylinders, the latter being preferred. Roller 34 is pressed toward the narrower end of the race 22 by a spiral spring 36, which abuts at one end against the deeper radial end of the race and at the other end against the said roller, while the roller 35 is similarly pressed toward the narrower end of the race 23 by a spring 37. Each roller is of a diameter such that upon one side it engages with the bottom of the not-ch o1' recess and upon the opposite side with the inner wall of the flange 25 at a point near the end wall of the recess, at the shallow portion thereof, and owing to the converging arrangement of the bottom of the recess with reference to the inner surface of the flange each roller performs the function of a wedge. In Fig. 3 if the flange 25 be turned toward the right roller 34 jams, binds, or wedges the flange still more firmly against rotation independently of the disk 15, or if the fiange be turned in the opposite direction the other roller 35 jams the flange and disk together more tightly, so that in either case the ratchet-wheel and platen are caused to turn or move integrally-that is, the flange, notches, rollers, and springs taken together form a self-binding clutch or lock for securing the platen to the line-space wheel, or assuming the flange to be stationary the same binding action would result from an attempt to turn the disk 15 relatively thereto.

The hub 18 is provided with a central bore in which is placed an inwardly-sliding device 38, which may be made in the form of a rod, shaft, or tube or sleeve. To the outer end of the rod or shaft is secured a finger-piece, preferably in the form ofa wheel 39, by means of a pin 41 passingthrough its hub 40. Within the platen and abutting against the shoulder 14 aforesaid is placed a bushing 42 to afford a sliding bearing for the inner end of the shaft 38. To the shaft are secured two collars 43 44. Between the bearing 42 and the collar 43 is a coiled compression-spring 45, abutting at one end against the bearing and at the other end against the collar and tensioned to slide the shaft 38 outwardly to the extent allowed by the collar 44, which normally abuts against the end of the hub 19 aforesaid. The inward movement of the shaft is limited by contact of hub 40 with a collar 4G, placed on the shaft outside of the carrier 6, as indicated by dotted lines in Fig. 1. To prevent the shaft from turningindependently of the hub 19, the former is provided with a cross-pin 47, which engages with the slot 21 in the hub. A portion of the shaft between IIO IZO

' as 48 and being parallel withL the slot '2l and at right angles to theslot 20.

At a point near lits bearing in the disk 15Y the shaft is also provided with flattened portions or recesses 49 parallel with the fiattened portions 48 and having abrupt ends. Oppositely arranged in the slots 20 in the hub 19 are two similar levers' 56. These latter are pivoted to the hub at points 52 53 and 'extend into the clearance-slot 13, provided in the: wooden core 1. Each lever is provided with` a tooth 56a, normally standing in proximity to one of therollers '35 and provided with a bevel, as indicated at Fig. 6. At their lefthand ends the levers normally bear upon the iiattened portions 48 of the shaft 38, which act as stops for the levers. p provided near its pivot with 'a short heel which extends into one of the recesses 49 in the shaft and normally abuts againstthe lefthand end thereof. Near their'left-hand ends the levers are provided with slopingfacesl 5 4, which face the collar'44, and the latter may be provided with a corresponding bevel.

In operation the hand-Wheel 39'is used as a push-button and pressed toward the left, forcing inwardly the shaft '38 and all of the parts secured thereto and compressing th'e spring 45. Thev collar 44 contacts with the sloping faces 54 of the pair of levers and by a wedging action separates the levers, WhichturnuponY their pivots, the teeth' being caused to enter therecesses 22 23 inthe disk 15 between the rollers and the end walls of therecesse's,x the position of the parts at this time being shown in dotted lines at Figli. The beveled portions of the teeth engage the rollers andby a wedging action forcethe latter toward the deeper portions of the races', so that the rollers no longer contact with both the bottomsof the recesses and the inner surface of the flange. By this operation the disk 15 Yand the platen secured thereto are releasedfrom the control of the line-space wheel and the detent 26 and may therefore be rotatedindependentlyto any extent. The position of the rollers at the end of the releasing operation isindicated'at Fig. 3 in dotted lines.

spring 45 it is returned to normal position,vr

together with the shaft 38. D uring this movement the-short heels upon the' levers 56 are engaged bythe left-hand ends ofthe recesses 49, and the levers are thereby Vrocked upon their pivots -until their left-hand ends again contact with the flattened sides 48 of theshaftf As the teeth 56a are'withdrawn from the re` cesses 22 23 thesprings 36 37 force the rollers toward 'the narrow ends of the races until re- Each lever'is also' Either hand-wheel may beused for turningthe platen after itsl tion of the shaft`38. f n modification is substantially the same as that the disk 15 to engage the rollers 35. v l u disk 15 is provided with a radial slot 59, into"- engagement'is effected between the iiange,

the rollers, and the bottoms yof, the recesses,

line of writing exactly to the lprinting-point,

or invwriting upon vruled paper or in filling Ordinarily lines can be written upon the paper only at ,cer tain variable intervals,`as determined by the' blanks in printedl matter.

pitch of the teeth or the'v distance between the notchesin theline'space wheel, `and in cases where it isdesired to write at some intermedi? ate pointer points upon the paper it is usual to grasp the'sheet and Vpull lit backwardly around'the platen without'nioving'tlie latter.

By this invention the paper is not adjusted Y withreference to the platen; but both thepaper and platenlare bya simple operationadjusted with reference to the" line-space wheel and after such -adjustment may be again; locked to the line-space'wheel.V As a result of frequent adjustments .ofthe V'platen in this manner the entire printing-surface 'of the instead.v of certain longiti'idinalline's 'thereoi",-

by successive avoided. l In 'the several modilications'illustrated the ously described and have similar functions. l

Referring to Figs; 7 to 12, inclusive, thev l hub19^of thedisk l5 abuts 'again/S15 the shoulder 14 and the bearing 42 is',securedwithin"` said hub 19, Figs. 7 and 10, whichhas a bore l platen is subjected to the blows of the'types j so that'the formation of the depressionscau'sed `type-blows is toa great extent IOO parts bearing'thesame nu'meral'sof reference -are substantially identical with parts previ-v,

for the reception of spring 45, which abuts iagainst the bearing'42 and thepin 47 and is tensioned'to move the'shaft'38 outwardly.

pivoted at 52 and 53,:respectively, to the-hub,

The teeth 56a areborne by a pair oflevers 56h,

.19 and havingvends extending inwardly of Athe 'hub and engaging a' slotl 57 'in the shaft38, lwhereby the levers may be moved in either direction.;v A pin 58,fast `in the shaft'38 its inner end, abuts against the inner sideoff.

the bearing 42, and yso limits the outward mo- The operation of this IZO of the preferred form of the invention alreadyv l described.

Referring to Figs. 13 to'17, inclusive, theratchet-Wheel 24 fis v'rotatably mountedY upon of oppositely disposedl c one pointed radial pins 56C, which slide in perforation's 2On in The y whichthe inner ends of the pins 56c extend.v 'l

The inner face of the lratchet-Wheel"24'is pro'-` vided with a depressed or counter-sunk portion 60. To a rabbet formed in the shaft 38 is secured, by a screw 61, a double cam-plate 44a. This cam-plate enters the circular depression and engages the slot 59, so as to turn the disk and platen either relatively to the line-space wheel or together therewith, as the case may be. he innerends of the pointed pins 56c rest upon the inclined edges of the cam-plate 44;. By pressure upon the {ingerwheel or push-button 39 the shaft may be moved endwise in the direction of the arrow, compressing the spring 45 and causing the cam-surfaces on the plate 44 to force the pins 56c outwardly, so that their toothed ends engage the rollers 35 and by a wedging action force them toward the wider portions of the races, as indicated in dotted lines at Fig. 14. After the desired adjustment of the platen is effected and the finger-piece 39 released the latter is returned to normal position by the spring 45, which bears at its right-hand end against a pin 47, which transfixes the shaft 38, and the pins 56'3 are forced inwardly by the spring-pressed rollers 34 35 as the latter resume their normal locking positions.

Referring to Figs. 1S to 23, inclusive, the disk 15 is provided with a peripheral flange 61, which is cut away at 22 23 to form the hereinbefore-described reversed angular recesses. Pivoted upon studs 62 63, projecting laterally from the face of the disk, are a pair of levers 56d, each of which is provided with a lateral tooth 560, that enters one of the races 22 23 in position to engage the roller therein at the releasing operation. Each of the levers is provided with an edge or face adapted to be engaged by one of the cam-surfaces on the above-described plate 44". In this modification the line-space wheel is like that shown at Figs. 16, and the disk 15 is provided with a slot 59, as shown at Fig. 15, wherein the plate 44a works and by which it is splined to the platen. When the button 39 is pressed to the left, the cam edges of the plate 44 bear upon the levers 56d and swing them about their pivots, whereby the lever-teeth 56e are caused to move the roller-wedges 34 35 to the wider portions of their' races, as shown at Fig. 20. Upon the return of the button 39 to normal position the levers 56l are caused to resume normal position by the action of the spring-pressed rollers 34 35 during the movement of the latter to relock the disk to the line-space ratchet-wheel.

In the modification illustrated at Figs. 24 to 28, inclusive, the endwise-rnovable shaft may, if desired, extend through the platen and beyond the platen-frame and may be provided at each end with suitable fin ger-pi eces, either of which may be manipulated to turn the platen and line-space wheel together or to release the platen from the line-space wheel or to turn the platen independently after the releasing operation; but preferably the righthand thumb-wheel 10 is provided with a short shaft 7, which is rigidly secured to the hub of the line-space wheel 24 by a pin 8, The left-hand finger-piece 39 is provided with an endwise-movable shaft 38, slidably journaled in the left-hand bar 6 of the platenframe and extending through the platen, its right-hand end being adapted to slide in a bore formed in the hub 19 ofthe disk 15. The shaft 38 is splined to the disk by means of a cross-arm 64, fixed to the shaft by a rabbet and screw and working in a radial slot 21 in the hub 19. Upon the ends of the cross-arm are formed bevel-end teeth 56, in register with the ball-recesses, near the narrow ends thereof. The spring 45 works between the end of the hub 19 and the collar 43, fixed upon the shaft, and is tensioned to press the shaft to the left, the movement of the shaft being limited by a projecting pin 65, abutting against the said hub 4. Pressure upon the button 39 will move its shaft in the direction of the arrow and cause the teeth 56n to enter the recesses and force the balls to an inoperative position, thereby releasing the platen. Upon the relief of the key 39 from pressure the parts are returned by spring 45 to normal position, and the spring-pressed rollers relock the disk to the linespace wheel. In case the shaft 38 be extended through the right-hand end of the platen-frame, as aforesaid, it is obvious that the relation of the cross-arm 64, the disk, and the ratchet-wheel may be reversed, so that lthe release may be effected by a pressure to the left. One way of effecting this reverse would be to turn the entire platen structure end for end, so that the line-space wheel would stand at the lefthand end of the platen, as in some well-known makes of type-writing machines.

Many other changes may be made within the scope of my invention, the gist whereof resides in releasably locking the platen to the line-space Wheel at any position of the platen.

It will be noted that the platen is locked to the line-space wheel by aself-binding action. The best form in which this idea can be carried out is one involving the use of rollers or balls; but I do not wish to be limited altogether thereto, since it is plain that various changes in detail construction, arrangement, and forms of parts may be made involving the idea of positively locking or wedging the parts together without departing from the gist of my invention.

It will be observed that in all forms of my invention a positive lock is effected between the line-spacing ratchet-wheel and the platen, whereby these two parts must of necessity always move together as one piece and so that there cannot be any creeping or movement of the platen relatively to the line-space wheel when the line-space lever is violently actuated and suddenly arrested, such as is liable to occur in all constructions wherein some form of friction clutch or device is arranged between the line spacing wheel and the platen. It will of course be understood that where the platen may overthrow relatively to IOO IIO

ISv

the line-spacewheel at the end of the linespacing operation the line-spacing of the paper is irregularly produced and objectionable, and for this reason many ofthe frictional devices'heretofore used between the platen and the line-space wheel have been discarded, owing to their inefficiency to prevent such overthrow. In the concluding claims, where I use the term lock, I mean not a frctional connection between the platen and the line-` space wheel, but a positive lockingmeans which isvnot dependent at all upon frictionalv engagement betweenthe mem bersgof the parts to be connected together.

In certain other prior constructions means are provided for positivelylocking togetherthe platen and the line-space wheel, such Vmeans consisting ofV intermediate ratchet wheels and pawls; butthesedevices are obj ectionable for the reason that the platen cannot be lockedin any position, but only in such positions as are permitted by theintervals or;

notches between the teeth of the "ratchet- -vwheel, which makes it im possibleto obtain eX-r act registration of the line to befilled in with the printing-point, whereas in my construe-L tion every portion of the surface of the platen is adapted to be brought to exact registry with the printing-pointand locked thereat. It will also be observed that in my vclutch mechan-f. ism the devices employed are in a sense self. binding, since they are so arranged that the greater the force applied to turn the ratchetwheel the greater the binding. of the clutch-1 ing devices, which is radically different from the mode of operation of frictionally-acting.

constructions or mechanisms in"'which the vclutching or binding action ofthe parts isv due generally to the power of a spring andy in which the greater the force applied to turnl the part the more liable are the parts to move relatively to each other. It will also benoted that I have provided,mechanism,su'ch as op. `positely-acting clutches, 4 for .connecting together the' platen and theiine-spaceratchet-. wheel at any relative; position thereof, that: the platen and line-feed wheel -have .a com-t mon axis, and that a Wedging or locking de vice-is movable around Ysaid axis independ: ently of both the platen and the line-feed,

wheel and adapted to lock the platen to the line-feed wheel; that the locking of the platen to the line-feed wheel is preferably effected l by a; pair of oppositely-disposed and oppositely-acting-releasable turning or Vrolling wedges, that a manually-actuable device provided kwith teeth is adapted to engage the;

- wedges and move them so as to release the platen, and that said release is preferably.

edected by the manual pressurel in a direction lengthwise of the platen, and that the hand-wheel 39 is adapted. to operate the shaft or rod 38 so as either to turn the platen and i line feed wheel together yor to release. the platen from the line-feed wheel or to turn the `platen alone after such releasing action.

Where in the claims I use the-term. lock Ythe page.

.by .Letters Patent, is-

I do not mean to include any device that does no more than merely offer frictional opposition to the independent movement of the platen relat-ively to' the line space wheel. The principal'objection to suchfrictionallyacting clutches `is that they can be forced, and-hence the platen when violently actuated is liable to overthrow, thus making the lines of writing appear at irregular intervals upon This objection is overcome b'ymy locking-ciu tch, which is self-binding, so that any force that may be applied'to the platen for turning it independently of the line-space wheel only tends toy bind the platen even more closely. to said wheel. vIn view of this feature of operation it will be understoodthat the slight rotative shocks whichare constantly being receivedk by the platen at the ordinary line-spacing operations tend always to lock the platen to the .linesp'ace wheel,

audit will also'be seen that' no mattei' how firmly it may become locked it is still readily `releasable by the described mechanism.

What I claim as new, and desire to secure ;1. .In aplaten-release mechanism', the combination. ofv a platen, a line feed ratchet- .whee-l, and mechanism for releasablylocking the .two against independent rotation inail relative positions thereof.k Y

2.. In aplaten-release mechanism, the combination of a platen, -a line-feedv ratchetwheel, and means for locking the. platen and thewheel together in anyrelative position thereof. against independent rotation and for releasing the platen from the wheel, whereby the platen may be rotated in either direction .to any desiredpositionr relatively to the printing-point and to the wheel and may then be 'relocked to the wheel.

3. In a platen-release'mechanism,lthecombination of a platen, Va Vdetent-held line-feed ratchetwheel,aclutch mechanismlocking the platen. and wheel againstindependent `rota- '.tion in any relative position; thereof,'and

means foropening the clutch mechanism and -releasing the platen, whereby the. latter imay be rotated independently in either direction tozany desired position and .may then be' retion and arrangement vbeing such that 'at- 7tem pted relativeimovement .between the line- IIO feed wheel and the platen eects a more powerful binding action of the said connecting devices.

6. Inatype-writing machine, the combination With a line-feed ratchet-wheel and a platen rotatable relatively thereto, of mechanism for locking the platen and line-feed wheel against relative rotary movement in only one direction, mechanism for locking the platen and line-feed wheel against relative rotary movement in only the other direction, and means for releasing both of said locking mechanisms.

7. In a type-writing machine, the combination of a line-feed ratchet-wheel, a platen Whose axis coincides with the line-feed-Wheel axis, said platen being rotatable relatively to the line-feed Wheel, and alocking device movable around the common axis independently of both the platen and the line-feed wheel, and adapted to lock the platen to the linefeed wheel.

In a type-Writing machine, the combination ot a line-feed ratchet-wheel and a platen connected together by independent releasable self-binding Wedges arranged between the platen and the line-feed ratchet-Wheel and locking the two together.

9. In a type-writing machine, the combination of a platen, a line-feed ratchet-Wheel, and mechanism, including a pair of oppositelydisposed independent releasable wedges movable around the axis of the platen and locking the platen and wheel together.

lO. In a type-Writing machine, the combination of a platen, a line-feed ratchet-wheel, and a releasable and rotatable Wedge constructed to lock the two together by atnrning movement of the wedge.

ll. In a type-writing machine, the combination of a platen, a line-feed ratchet-Wheel, and mechanism,ineludingapairofoppositelydisposed releasable and rotatable Wedges, for locking the platen and Wheel together.

l2. In a type-Writing machine, the combination with a line-feed ratchet-wheel and a platen rotatable relatively thereto, of a Wed ge for locking the platen to the ratchet-Wheel, and normally disconnected means for engaging said Wedge to move it and release the platen.

13. In a type-Writing machine, the combination with a line-feed ratchet-Wheel and a platen rotatable relatively thereto, of a pair of wedges for lookin g the platen to the ratchetwheel, and a pair of levers constructed to engage said Wedges to move them and release the platen.

Il. In a type-writing machine, the combination with a line-feed ratchet-Wheel and a platen rotatable relatively thereto, of a Wedge for locking the platen to the ratchet-Wheel, a lever constructed to engage said vWedge to move it and release the platen, and a rod for operating said lever.

l5. In a type-Writing machine, the combination with a line-feed ratchet-Wheel and a platen rotatable relatively thereto, of Wed ges for locking the platen to the ratchet-Wheel, and a manually-operable device provided with teeth for engaging said Wedges and moving them so as to release the platen.

16. In a type-Writing machine, the combination with a platen, of a line-feed mechanism ineluding a line-feed ratchet-Wheel and releasable means for locking the platen to the line-feed Wheel at all relative positions thereof, said line-feed mechanism comprising a member that may be pressed in a direction lengthwise ofthe platen to eteet such release.

17. In a type-writing machine, the combination of a line-feed ratchet-wheel, a platen rotatable relatively thereto, means tor locking the platen bya Wedging action to the linefeed wheel at all relative positions thereof, and a rod movable relatively to the platen and provided with means for releasing the platen from the line-feed wheel.

I8. In a type-Writing machine, the combination of a line-feed ratchet-wheel, a platen rotatable relatively thereto, means for locking the platen b vawedging action to the line: feed Wheel at all relative positions thereof,

and a platen-rotating shaft provided with a hand-wheel and movable endwise relatively to the platen and also provided With means for releasing the platen from the line-feed wheel.

19. In a type-writing machine, the combination with a line-feed ratchet-wheel and a platen rotatable relatively thereto, of means for locking the platen by a Wedging action to the ratchet-Wheel, and an endWise-movable shaft splined to the platen and provided With means for releasing the platen from the linespace wheel, and provided also with a handwheel, whereby the shaft may be operated either` to turn the platen or to effect said re- ,lease 20. In a type-Writing machine, the combination with a line-feed ratchet-wheel, aplaten rotatable relatively thereto, means for locking the platen by a wedging action to the line-feed wheel at all relative positions thereof, and a hand-Wheel constructed to rotate both the platen and ratchet-wheel when locked together and provided with means for releasing the platen from the ratchet-Wheel, and also constructed to rotate the platen after the releasing operation.

2l. In a type-Writing machine, the combination of a platen, a ratchet-Wheel, oppositely acting clutches for connecting the platen and the wheel together, one acting to oppose rotation of the platen in one direction, the other to oppose rotation in the opposite direction, a shaft movable axially of the platen, and means operated by the shaft for disengagingsad clutches to permitindependent rotation of the platen in either direction.

22. In a type-Writing machine, the combination of a platen, a ratchet- Wheel, oppositely acting clutches for connecting the platen and ratchet-Wheel together, a shaft movable axially of the platen, and movable teeth operated thereby for disengaging the IOO IIC

said clutches, to permit independent rotatio sitely acting clutches for connecting the platen and wheel together, a shaft movable axially of the platen, and .pivoted actuators connected to the shaft androperated thereby to disengage the said clutches to permit independent rotation ofthe platen in either direction.

24.Y In a type-Writing machine, the combination of a platen, a ratchet- Wheel, oppo-` sitely-acting clutches for connecting the platenand the Wheel together,- .a shaft movable axially of the platen, and .clutch-opening levers, pivotally connected with thefplaten by axes at right anglesto the axis of said shaft, and operatively connected with the shaft for opening said clutches to permit rotation .of the platen in either direction.

25. In a type-writing machine, the combination of a platen, a ratchetwheel, oppositely acting clutches for connecting the platen and Wheel together, clutch-opening levers pivotall y con nected with the platen upon axes at right angles to the axis' of the platen,

and a shaft movable axially of the platen and having a collar. adapted to operate said openers by a camming action.

26. In a-type-writing machine, the combination of a platen, a ratchet-Wheel, oppo sitely acting .clutches for connecting the platen and the Wheel together, pivoted clutchopeners, and a shaft movable axially of the platen and provided with a cammed part for actuating. said openers.

27. In a type-Writing machine, the combination of a platen, a line-feed ratchet-Wheel, and a releasable wedge constructed to Work between two surfaces, one of which surfaces is cn rved concentrically to the platen and the other of which is inclined to said concentrically-curved surface, one of said surfaces being secured to the platen andthe other to the Wheel.

28. In a type-Writing machine, the combi said recesses adapted to engage With saidV iiange and said bottoms to lock the platen and the wheel together, and means for moving Ysaid rollers Ain said recesses to disengage the' same, to permit rotation of the platen inde-v pendently of the ratchet.

29. In a-type-Writing machine, the combi' nation of a platen, a disk fast thereto, and

vhaving recesses in its periphery Whose bot-V toms are inclined some one Way and somethe other with respect to said periphery,a ratchet- Wheel exterior to the said disk, spring-pressed rollers in said recesses adapted to coact withl the bottoms'of said recesses and with the Wheel to clutch or fasten the Wheel and the platen together and also adapted to be moved in lthe recesses to disengage the platen from the Wheel, and-means for moving the said rollers-toward the Wider portions of saidY recesses to effect said disengagement.

30. In a type-Writing machine, the combination of .a platen, a disk fast to the platen and provided withtapering recesses, a loose ratchet-wheel provided with a ange opposing said recesses, spring-pressed rollers in said recesses adapted to engage with said bottoms and said iange to lock the platen and said Wheel together and' to be moved towardthe wider parts of the recesses to disengage the platen from the Wheel, a shaft movable axially ofthe platen, and means operated by saidY shaft for moving said rollers toward the said Wider parts 'of the recesses to effect such disengagement.

'31. In la type-writing'machine, the combination of a platen, a line-space ratchet-Wheel, a disk fast to 'the platen and provided with tapering recesses whose bottoms are reversely inclined, a surface on said ratchet-wheel op-A posing said recesses, springpress`ed rollers-in said` recesses adapted to engage With both said ratchet-Wheel and said ybottoms to lock the platen and the Wheel'together, and means for moving said rollers toward the'Wider parts of said recesses to disengage the-disk from the Wheel. l

32. Inra type-Writing machine, the combination of a platen, a diskfast thereto and provided With tapering recesses in its periphery Whose bottoms are reversely inclined, Va ring exterior to said periphery and having linespace ratchet-teeth connected thereto, springpressed rollers in said recesses adapted to coact -with the bottoms thereof and with the said ring to clutch or wedge together said ring and the disk, and means for moving said roll- IOO IIO

ers toward the Wider portions of said recesses.

33.- In a type-Writing machine, the combination of a platen, a disk fast thereto and provided with reversely inclined tapering recesses, a ratchet-Wheel provided with a surface opposing said recesses, spring-pressed rollers in said recesses adapted to engage said ratchet-Wheel to` lock the disk and ratchet- Wheel together, ashaft movable axially ofl the platen, and means operatively connected with said shaft for moving said rollers toward the wider parts of the recesses.

34. In a type-Writing machine., the combi-` nation of a platen, a disk fast to said platen `and provided with reverse angular recesses, a ratchet-wheel having a flange opposing said recesses, spring-pressed rollers `in said recesses adapted to coact With the bottoms thereof and With the iiange to lock the Wheeland platen together, a shaft movable axially of the platen, and wedges operatively connected to the shaft and adapted to force the rollers toward the wider portions of said rpcesses to disengage the disk and flange.

35. In a type-writing machine, the combination of a platen, adisk fast thereto and having reverse angular recesses, a ring opposing said recesses and connected to a line-space ratchet-wheel, spring-pressed rollers in said recesses adapted to coact with the bottoms thereof and wit-h said ring to lock the platen and ratchet-wheel together, a shaft movable axially of the platen, wedges for moving said rollers to release the platen from theratchetwheel, pivoted arms carrying said wedges, aud operative connections between said arms and said shaft.

3G. In a type-writing machine, the combination of a platen recessed atone end, a disk secured to the recessed end of the platen and provided with reverse angular recesses in its periphery, a line-space ratchet-Wheel having a iiange surrounding the periphery of the disk, spring-pressed rollers in said recesses for engaging with the bottoms thereof and with said liange to lock the platen and Wheel together, an endwise-movable shaft arranged partly Within and partly without said platen, and means connected with said shaft for moving said rollers toward the wider portions of said recesses.

37. In a type-writing machine, the combination of a platen recessed at one end, a disk secured to said recessed end and provided with reverse angular recesses in its periphery, a line-space ratchet-wheel having a flange or shoulder surrounding said disk, springpressed rollers in said recesses adapted to coact with the bottoms thereof and with the flange or shoulder to lock the platen and wheel together againstindependent rotation, a shaft partly Within and partly without the platen and movable endwise independently thereof, wedges for moving said rollers toward the widerportions of said recesses, pivoted arms carrying said wedges, and operative connections between said arms and said shaft.

38. In a type-Writing machine, the combination of a platen-carrier, a platen recessed at one end, a disk 15 secured to the recessed end of the platen and provided with reverse angular recesses 22, 23, a hub 18 on said disk and journaled in the platen-carrier, a linespaceratchet-wheel loosely mounted on the hub 18 between the disk 15 and the platencarrier and having a flange E35 surrounding the disk 15, spring-pressed rollers 3l 35 in said angular recesses, a hub 19 having intersecting slots 20, 2l, extending longitudinally thereof, said hub being on the disk l5 and extending into the platen, levers 50, 51, pivotally connected with the hub 19, an endwisemovable shaft 38 sliding in bearings in the hubs 18, 19, and having a pin 47 engaging the slot 2l and also having flattened portions 49 with abrupt ends for engaging with extensions of levers 50, 51, a collar 44 in said shaft for engaging said extensions of the levers 50, 5l, and a hand-wheel 38 on said shaft.

39. In a type-writing machine, the combination of a platen, a disk fast thereto and provided with reverse angular` recesses in its periphery, a ring exterior to said periphery and connected to a line space ratchetwheel, spring-pressed rollers in said recesses adapted to coact with the bottoms thereof and with the ring to lock the wheel and the platen together against independent rotation, a shaft movable axially of the platen, wedges for moving said rollers to disengage the disk and ring, and connections between said springpressed shaft and said wedges for actuating the latter.

Signed at the borough of Manhattan, city of New York, in the county of New York and State of New York, this 25th day of November, A. D. 1899.

WALTER J. BARRON.

Vitnesses:

M. W. POOL, E. M. WELLS. 

